Here’s a look from the Instrument Context Camera (ICC) looking towards the front of the InSight Lander on Mars.
The foot-pads of the lander seem to be pressed well into the Martian soil which has several small rocks scattered about. The rocks are in the subsoil as well and there could be such rocks blocking the “mole”, the probe that hammers itself into the ground to take thermal conductivity tests.
The mole hit some obstruction shortly after it began and has been stopped. There is a plan forward, the team was going to command a 10 or 15 minute hammering session to see if they can get through. They also were also to take a thermal conductivity reading, a 24 hour test, the results of which might be downloaded today (?). There have been no updates on either of these as yet.